Abstract Heteronuclear cationic complexes, [LCuLn] 3+ and [(LCu) 2 Ln] , were employed as nodes in designing high‐nuclearity complexes coordination polymers with a rich variety of network topologies (L is the dianion Schiff base resulting from 2:1 condensation 3‐methoxysalycilaldehyde 1,3‐propanediamine). Two families linkers have been chosen: first consists exo ‐dentate ligands bearing nitrogen‐donor atoms (bipyridine (bipy), dicyanamido (dca)), whereas second oxygen‐donor (anions derived...

A trianionic ligand H3L (2-hydroxy-N-(2-{[(2-hydroxyphenyl)methylene]amino}-2-methylpropyl)benzamide) with an inner N2O2 coordination site and oxygen atom coming from amide function not involved in this yields monoanionic LCu− complexes that react Ln(hfa)3·2H2O (hfa = hexafluoroacetylacetonato ligand) to give dinuclear Cu–Ln self-assemble into tetranuclear species, as demonstrated by the structural determination of [LCuDy(hfa)2(dmf)2]2 complex. High-spin species are then isolated for two...

The cyanoacetate complexes, {[Ln₂(CNCH₂COO)₆(H₂O)₄]·2H₂O}_n, with Ln = Gd, Nd, show field-induced slow relaxation: resonant phonon trapping and Orbach process for direct processes Nd.

A series of water-soluble sodium salts 3-formyl-4-hydroxybenzenesulfonic acid thiosemicarbazones (or 5-sulfonate-salicylaldehyde thiosemicarbazones) containing different substituents at the terminal nitrogen atom (H, Me, Et, Ph) and their copper(ii) complexes have been prepared characterised by elemental analysis, spectroscopic techniques (IR, UV-vis, 1H NMR), ESI mass spectrometry, X-ray crystallography cyclic voltammetry. The proligands exhibit moderate water solubility good stability in...

This study describes the synthesis of first aziridinium-based compounds, namely hybrid perovskites (AzrH)PbHal3 (where AzrH = aziridinium, Hal Cl, Br or I). highly reactive species was stabilized in 3D lead halide frameworks and found to be a small enough organic cation promote formation semiconducting organo-inorganic materials.

Hybrid organic-inorganic lead halide perovskites are promising candidates for next-generation solar cells, light-emitting diodes, photodetectors, and lasers. The structural, dynamic, phase-transition properties play a key role in the performance of these materials. In this work, we use multitechnique experimental (thermal, X-ray diffraction, Raman scattering, dielectric, nonlinear optical) theoretical (machine-learning force field) approach to map phase diagrams obtain information on...

The monometallic precursors L1Cu and L2Cu (L1H2 standing for 1,3-bis((3-ethoxysalicylidene)amino) propane L2H2 1,2-bis((3-methoxysalicylidene)amino) ethane) react with sodium dicyanamide (dca) (NaN3C2), a mixture of gadolinium nitrate, to yield heterodinuclear L2CuNa(NCNCN) L1CuGd(NO3)(NCNCN)2 entities. structural determination shows that two Cu-Na entities are linked by dca an original mu1,1 coordination mode, evidenced here the first time, tetranuclear complexes. Two hydrogen bonds operate...

The copper(II)-gadolinium(III) and copper(II)-terbium(III) complexes studied in this report derive from disymmetric trianionic ligands abbreviated H3Li (i = 4-6). These are obtained through reaction of different aldehydes with "half-units" having an amide function, the latter resulting monocondensation diamines phenyl 2-hydroxy-3-methoxybenzoate. Upon deprotonation, Li 4-10) possess inner N2O2 coordination site one amido, imine, two phenoxo functions, outer O2O2 or O2O site, amido oxygen...

Abstract We report herein the synthesis and characterization of a new mononuclear nickel complex based on thiosemicarbazone ligand that exhibits an electrocatalytic behavior for H 2 evolution in DMF using trifluoroacetic acid (TFA) as proton source. Catalysis is observed at quite small overpotential values maximum turnover frequency (TOF max ) 3080 s −1 was extrapolated 1 m concentration foot‐of‐the wave analysis cyclic voltammetry data. Gas during controlled potential electrolysis...

Two novel bidimensional coordination polymers, [Co(azbbpy)(4,4'-bipy)0.5(DMF)(NCS)2]·MeOH (1) and [Co(azbbpy)(bpe)0.5(DMF)(NCS)2]·0.25H2O (2), resulted from the assembling of cobalt(II) ions by 1,3-bis(4-pyridyl)azulene, using either 4,4'-bipyridyl or 1,2-bis(4-pyridyl)ethylene as neutral spacers. The nodes in 1 2 act single-ion magnets (SIMs).

The synthesis and characterization of a dinuclear bis(thiosemicarbazone) cobalt complex [Co2 L2 (NCS)2 ] is reported. This exhibits significant catalytic activity for hydrogen production in DMF by using triethylammonium (Et3 NHBF4 ) as the proton source. Cyclic voltammetry data allowed maximum turnover frequency 130 s-1 1 m concentration to be determined. nature process dihydrogen were confirmed gas analysis during controlled potential electrolysis experiments. Quantum chemical calculations...

The current study describes the synthesis, physicochemical characterization and cytotoxicity evaluation of a new series pyrrole derivatives in order to identify bioactive molecules. pyrroles were obtained by reaction benzimidazolium bromide with asymmetrical acetylenes 1,2-epoxybutane under reflux through Huisgen [3 + 2] cycloaddition several ylide intermediates corresponding dipolarophiles. salts from benzimidazole bromoacetonitrile. structures newly synthesized compounds confirmed...

3D hybrid perovskites based upon small organic cations gave start to a new intensively growing class of semiconducting materials. Here we report on the elaboration quantum dots recently emerged perovskite (AzrH)PbBr3 (AzrH = aziridinium cation). By employing antisolvent precipitation technique and stabilization with cationic surfactant succeeded in obtaining that display tunable luminescence. This piece work shows perspective aziridinium-based materials for advanced photonic nanostructures.

Abstract Mononuclear copper(II) salen‐type Schiff base complexes, Cu II L 1–5 [H 2 1 to H 5 = tetradentate N , O ligands derived from 2‐hydroxybenzaldehyde, 2,4‐dihydroxybenzaldehyde, 3,5‐dibromo‐2‐hydroxybenzaldehyde, 2‐hydroxy‐5‐nitrobenzaldehyde, 5‐chloro‐2‐hydroxybenzaldehyde and 1,3‐bis(3‐aminopropyl)tetramethyldisiloxane, respectively] were prepared in situ the presence of a salt or by direct complexation between presynthesised base. The compounds {CuL CuL · 0.5Py, 0.375CH Cl (CuL 3...

Three new binuclear helicates, [M2L2]·3DMF (M = Co(II), 1, Zn(II), 3) and [Cu2L2]·DMF·0.4H2O (2), have been assembled using the helicand H2L that results from 2:1 condensation reaction between o-vanillin 4,4′-diaminodiphenyl ether. The metal ions within helicates are tetracoordinated with a distorted tetrahedral geometry. Direct current magnetic characterization EPR spectroscopy of Co(II) derivative point to an easy axis type anisotropy for both centers, separation at least 55 K two...

Six dinuclear vanadium(V) complexes have been synthesized: NH4[(VO2)2((H)LH)] (NH4[1]), NH4[(VO2)2((t-Bu)LH)] (NH4[2]), NH4[(VO2)2((Cl)LH)] (NH4[3]), [(VO2)(VO)((H)LH)(CH3O)] (4), [(VO2)(VO)((t-Bu)LH)(C2H5O)] (5), and [(VO2)(VO)((Cl)LH)(CH3O)(CH3OH/H2O)] (6) (where (H)LH4 = 1,5-bis(2-hydroxybenzaldehyde)carbohydrazone, (t-Bu)LH4 1,5-bis(3,5-di-tert-butyl-2-hydroxybenzaldehyde)carbohydrazone, (Cl)LH4 1,5-bis(3,5-dichloro-2-hydroxybenzaldehyde)carbohydrazone). The structures of NH4[1] 4-6...

As ribonucleotide reductase (RNR) plays a crucial role in nucleic acid metabolism, it is an important target for anticancer therapy. The thiosemicarbazone Triapine efficient R2 inhibitor, which has entered ∼20 clinical trials. Thiosemicarbazones are supposed to exert their biological effects through effectively binding transition-metal ions. In this study, six iminodiacetate–thiosemicarbazones able form complexes, as well dicopper(II) were synthesized and fully characterized by analytical,...

Hydrazone complexes of Cu(II), Co(II), Zn(II), Ni(II) and Pt(II) with N-isonicotinoyl-N′-(3-metoxy-2 hydroxybenzaldehyde)-hydrazone (HL) were synthesized characterized by different physico-chemical techniques including elemental thermal analysis, magnetic susceptibility measurements, molar electric conductivity, as well IR (infrared), 1H-NMR 13C-NMR (hydrogen carbon nuclear resonance, UV-Vis (ultraviolet-visible), FAB (fast atom bombardment), EPR (electron paramagnetic resonance), mass...

A series of mononuclear [M(hfa)2(pic)2] (Hhfa = 1,1,1,5,5,5-hexafluoro-2,4-pentanedione; pic 4-methylpyridine; M FeII, CoII, NiII, ZnII) compounds were obtained and characterized. The structures the complexes have been resolved by single-crystal X-ray diffraction, indicating that, apart from zinc derivative, are in a trans configuration. Moreover, dramatic lenghthening Fe-N distances was observed, whereas nickel(II) complex is almost perfectly octahedral. magnetic anisotropy these thoroughly...

The versatile verdazyl family provides a new member as its reduced form 1,5-dimethyl-3-[3′-(hydroxymethyl)-2′-pyridine]-6-oxotetrazane (H3vdpyCH2OH). Upon oxidation and deprotonation in the presence of acetate salts CoII DyIII, vdpyCH2OH radical is able to self-assemble [(vdpyCH2O)2Co2Dy2ac8] (Hac = HO2CCH3), 2p–3d–4f cluster displaying single-molecule-magnet properties.

The synthesis of novel dielectric elastomers that show a muscle-like actuation when exposed to low electric field represents major challenge in materials science. Silicone modified with polar side groups are among the most attractive dielectrics for such purpose because their high polarizability over wide temperature and frequency range. Nitroaniline (NA) has strong dipole moment, therefore, its incorporation into silicone networks should allow formation increased permittivity. However,...

5‐methoxy‐2‐(((2chloro‐5‐(trifluoromethyl)phenyl)imino)methyl)phenol) (HL) and its cobalt (II), copper manganese nickel palladium platinum (II) complexes, [Co(L) 2 ]·4H O ( 1 ), [Cu(L) ] [Mn(L) (H O) ]·H 3 [Ni(L) 4 [Pd(L) 5 [Pt(L) 6 were synthesized characterized. The compounds investigated by different physico‐chemical techniques including IR, H‐NMR, 13 C‐NMR, UV‐Vis, mass spectroscopies, elemental thermal analysis, magnetic susceptibility measurements, molar electric conductivity....